The Maximum Power Point Tracking (MPPT) is essential to the Photovoltaic (PV) system to obtain the maximum output power P MPP even under temperature and irradiance variations. Since the widely used perturb and observe (P&O) method requires a small but continuous power perturbation to determine the maximum power point (MPP), the operating power point always oscillates around the MPP, which will give rise to the reduced available energy. In the proposed algorithm, once the MPP is reached, the operating point of the PV array does not oscillate but is fixed at that point. Therefore, the tracked power can be maximized. Moreover, since the proposed algorithm can nonstop search the MPP, it can successfully track the MPP even in case of rapidly changing atmospheric conditions and has higher MPPT efficiency than conventional algorithms.